The working position is below the pivot

Abrasive: Bonded Silicon Carbide

What if I buy Boride stones 3mm thick to keep all my collection uniform

and 1200 grit

Gritomatic Silicon Carbide 240

boride am k stone for edge pro Grit:100 The working position is belowBoride Sharpening Stones are used for sharpening knives on Hapstone Pro sharpeners. Boride offers a wide range of stones with different performance values and different rates of wear. Boride stones are made of aluminum oxide, with the exception of CS HD series stones, which are made of silicon carbide. All Boride stones are 6 mm thick and are mounted on high quality aluminum blanks. Stones that are 6 mm thick offer a longer life cycle than stock Edge